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Capital Stock (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		12 Months Ended
	Sep. 15, 2015	Oct. 24, 2015	Oct. 25, 2014	Jul. 25, 2015	Jul. 26, 2014
Stockholders' Equity Note [Abstract]
Stock Repurchased and Retired During Period, Shares	805,000	954,224		1,669,924
Total Consideration (Dollars in thousands)		$ 69,997	$ 0	$ 87,146
Average Price Per Share (in dollars per share)	$ 74.53	$ 73.35		$ 52.19
Stock Repurchased and Retired During Period, Value	$ 60,000	$ 69,997
Remaining authorized repurchase amount		$ 50,000
Shares Paid for Tax Withholding for Share Based Compensation				15,301	10,931
Value of Shares Paid for Tax Withholding for Share Based Compensation				$ 1,200	$ 300

X

- Definition

The total costs of shares repurchased during the period divided by the total number of shares that have been repurchased during the period which have not been retired and are not held in treasury.

+ References

No definition available.

+ Details

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X

- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the monetary value of shares the employees use to repay the employer.

+ References

No definition available.

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X

- Definition

The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 15



-Subparagraph (a)



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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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X

- Definition

Amount remaining of a stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 505



-SubTopic 10



-Section 50



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- Definition

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



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-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644



Reference 2: http://www.xbrl.org/2003/role/presentationRef



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